RYA Diesel Engines

This course gives you an overall awareness of the central systems of a marine diesel engine. We teach you how to take simple measures to prevent mechanical breakdown at sea and rectify defects that do not require workshop support.

2 June
Sun 02 Jun 2024
1 day, 10:00 AM - 05:00 PM
  • $395.00 incl. GST
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To book a private course Enquire here


Whether you sail a yacht with an auxiliary diesel engine or are a motor cruising enthusiast, this course will teach you enough to understand and care for your engine.

At the end of the course, you will be able to perform simple engine maintenance tasks, helping to extend the life and preserve the condition of your engine and save you money in the long run.

Although the Diesel Engine certificate is not compulsory, you need this level of knowledge to enter a Yachtmaster exam.

Course content  

Principles of the diesel engine

  • The four-stroke cycle
  • Naturally aspirated engines
  • Turbocharging
  • Intercooling/aftercooling

The fuel system

  • The basic system and tank 
  • The water separating pre-filter
  • Fuel lift pump
  • The engine fine filter
  • Injection pump and injectors 
  • Bleeding the system

The cooling system

  • Seawater cooling
  • Freshwater cooling
  • Temperature control / the thermostat
  • The seawater impeller pump

The air system

  • Air in
  • Air out

Engine electrical system

  • The basic system
  • Battery capacity and care
  • Drive belts
  • The alternator

Fault finding/ routine maintenance/spares and tools

Instruction and location

A qualified RYA Diesel Engine instructor will deliver the course to a small group in our waterside classroom.

What's included

  • Tuition and course training pack.


  • RYA Diesel Engine certificate

Before you start

  • No previous experience is needed for this introductory course.

What next?

  • If you spend any time on yachts, you will soon find yourself doing engine checks in real life. Practice makes perfect!
  • For a more comprehensive introduction to essential yacht, maintenance, join our Basic Yacht Maintenance course.